So I took a backup of a disk using G4L.
Let’s import it into a virtual machine on a RedHat running Xen.
virt-install --import --file <myfile> --prompt
answer the few questions.
Choose "Fully Virtualized".
Turn the SELinux into permissive mode in order to configure the network. This is a known bug and it looks like it’s not corrected yet.
Once the import is done your virtual machine should pop and boot properly.